1305.0283 (Jared Vanasse)

Fully Perturbative Calculation of $nd$ Scattering to
Next-to-next-to-leading-order    [PDF]

Jared Vanasse

We introduce a new technique to calculate perturbative corrections to neutron-deuteron ($nd$) scattering that does not require calculation of the full off-shell scattering amplitude. Its relation to the more familiar partial-resummation technique is explained. Also included is a calculation of the SD-mixing term that occurs at next-to-next-to-leading-order (NNLO) in pionless effective field theory $\mathrm{EFT}_{\not{\pi}}$\xspace. Using the new technique with the SD-mixing term a complete strictly perturbative phase-shift analysis of $nd$ scattering is performed up to NNLO including eigen-phases and mixing angles. This is compared to potential model calculations and good agreement is found with the eigen-phases and some of the mixing angles at low energies.

View original: http://arxiv.org/abs/1305.0283